linux-imx

/*

 * dm355evm_keys.c - support buttons and IR remote on DM355 EVM board

 *

 * Copyright (c) 2008 by David Brownell

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version

 * 2 of the License, or (at your option) any later version.

 */

#include <linux/kernel.h>

#include <linux/slab.h>

#include <linux/input.h>

#include <linux/input/sparse-keymap.h>

#include <linux/platform_device.h>

#include <linux/interrupt.h>

​

#include <linux/mfd/dm355evm_msp.h>

#include <linux/module.h>

​

​

/*

 * The MSP430 firmware on the DM355 EVM monitors on-board pushbuttons

 * and an IR receptor used for the remote control.  When any key is

 * pressed, or its autorepeat kicks in, an event is sent.  This driver

 * read those events from the small (32 event) queue and reports them.

 *

 * Note that physically there can only be one of these devices.

 *

 * This driver was tested with firmware revision A4.

 */

struct dm355evm_keys {

    struct input_dev    *input;

    struct device       *dev;

};

​

/* These initial keycodes can be remapped */

static const struct key_entry dm355evm_keys[] = {

    /*

     * Pushbuttons on the EVM board ... note that the labels for these

     * are SW10/SW11/etc on the PC board.  The left/right orientation

     * comes only from the firmware's documentation, and presumes the

     * power connector is immediately in front of you and the IR sensor

     * is to the right.  (That is, rotate the board counter-clockwise

     * by 90 degrees from the SW10/etc and "DM355 EVM" labels.)

     */

    { KE_KEY, 0x00d8, { KEY_OK } },     /* SW12 */

    { KE_KEY, 0x00b8, { KEY_UP } },     /* SW13 */

    { KE_KEY, 0x00e8, { KEY_DOWN } },   /* SW11 */

    { KE_KEY, 0x0078, { KEY_LEFT } },   /* SW14 */

    { KE_KEY, 0x00f0, { KEY_RIGHT } },  /* SW10 */

​

    /*

     * IR buttons ... codes assigned to match the universal remote

     * provided with the EVM (Philips PM4S) using DVD code 0020.

     *

     * These event codes match firmware documentation, but other

     * remote controls could easily send more RC5-encoded events.

     * The PM4S manual was used in several cases to help select

     * a keycode reflecting the intended usage.

     *

     * RC5 codes are 14 bits, with two start bits (0x3 prefix)

     * and a toggle bit (masked out below).

     */

    { KE_KEY, 0x300c, { KEY_POWER } },  /* NOTE: docs omit this */

    { KE_KEY, 0x3000, { KEY_NUMERIC_0 } },

    { KE_KEY, 0x3001, { KEY_NUMERIC_1 } },

    { KE_KEY, 0x3002, { KEY_NUMERIC_2 } },

    { KE_KEY, 0x3003, { KEY_NUMERIC_3 } },

    { KE_KEY, 0x3004, { KEY_NUMERIC_4 } },

    { KE_KEY, 0x3005, { KEY_NUMERIC_5 } },

    { KE_KEY, 0x3006, { KEY_NUMERIC_6 } },

    { KE_KEY, 0x3007, { KEY_NUMERIC_7 } },

    { KE_KEY, 0x3008, { KEY_NUMERIC_8 } },

    { KE_KEY, 0x3009, { KEY_NUMERIC_9 } },

    { KE_KEY, 0x3022, { KEY_ENTER } },

    { KE_KEY, 0x30ec, { KEY_MODE } },   /* "tv/vcr/..." */

    { KE_KEY, 0x300f, { KEY_SELECT } }, /* "info" */

    { KE_KEY, 0x3020, { KEY_CHANNELUP } },  /* "up" */

    { KE_KEY, 0x302e, { KEY_MENU } },   /* "in/out" */

    { KE_KEY, 0x3011, { KEY_VOLUMEDOWN } }, /* "left" */

    { KE_KEY, 0x300d, { KEY_MUTE } },   /* "ok" */

    { KE_KEY, 0x3010, { KEY_VOLUMEUP } },   /* "right" */

    { KE_KEY, 0x301e, { KEY_SUBTITLE } },   /* "cc" */

    { KE_KEY, 0x3021, { KEY_CHANNELDOWN } },/* "down" */

    { KE_KEY, 0x3022, { KEY_PREVIOUS } },

    { KE_KEY, 0x3026, { KEY_SLEEP } },

    { KE_KEY, 0x3172, { KEY_REWIND } }, /* NOTE: docs wrongly say 0x30ca */

    { KE_KEY, 0x3175, { KEY_PLAY } },

    { KE_KEY, 0x3174, { KEY_FASTFORWARD } },

    { KE_KEY, 0x3177, { KEY_RECORD } },

    { KE_KEY, 0x3176, { KEY_STOP } },